Impact of 8F intra-urethral catheter on uroflow rate in pressure-flow studies in patients with benign prostatic hyperplasia

目的 探讨良性前列腺增生患者尿道内置8F测压管在压力-流率测定中对尿流率的影响.方法 对103例良性前列腺增生(BPH)患者术前进行自由尿流率和尿动力检查,其中逼尿肌功能收缩良好组89例,逼尿肌功能收缩无力组14例.压力-流率测定中尿道内放置8F测压导管,分析比较自由尿流率和置管后尿流率的变化.结果 103例患者自由尿流率和带管尿流率的排尿量分别为(177.68±70.55)ml和(180.90±68.34)ml(P＞0.05).逼尿肌功能收缩良好组89例自由尿流率和带管尿流率的Qmax(10.2±3.1)ml/s、Qmax(7.8±3.9)ml/s(P＜0.05),逼尿肌功能收缩无力组14例自由尿流率和带管尿流率的Qmax(9.1±4.1)mi/s、Qmax(5.8±3.2)ml/s(P＜0.05).两组的Qmax下降值分别为(2.9±2.8)mi/s和(3.4±2.9)ml/s.组间比较差别有显著性意义(P＜0.05).结论 良性前列腺增牛患者尿道内置8F测压导管可影响最大尿流率测定值,有逼尿肌功能受损时可能影响更大,临床上在进行压力-流率结果分析时应充分加以考虑以便能更加客观、正确地加以评价.Objective To investigate the impact of 8F intra-urethral catheter on uroflow rate in pressureflow studies in patients with benign prostatic hyperplasia.Methods one hundred and three men with lower urinary tract symptoms underwent free uroflometry and pressure-flow study respectively.With an 8F urethral catheter,we recorded the standard pressure-flow variables such as umflometry,detrusor pressure at maximum uroflow and so on.We analyze,free uroflow rate and catheter's uroflow rate with paired t-test.Results The maximum voided volume in free uroflometry and in pressure-flow study were (177.68±70.55)ml and (180.90±68.34)ml respectively.The maximum free uroflow rate and the maximum catheter's uroflow rate were (10.2±3.1)ml/s and (7.8±3.9 )ml/s in BPH with detrusor normal-activity group ( P＜0.05 ),(9.1±4.1)ml/s and (5.8±3.2)ml/s in BPH with detrusor under-activity group(P＜0.05 ).The differences of uroflometry between two voids in tow groups were (2.9±2.8)ml/s and (3.4±2.9)ml/s( P＜0.05 ).Paired t-test showed that there was significant difference between the maximum free uroflow rate and maximum catheter's uroflow rate.Conclusions 8F urethral catheter appeared to have a significant impact on maximum umflow rate in benign prostatic hyperplasia and there was more significant impact in BPH with detrusor under-activity group.It must be considered when analyzing pressure flow parameters to make a accurate diagnosis.01652-531